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Temperature Effects on Growth and Leaf Production in Three Weed Species

Published online by Cambridge University Press:  12 June 2017

Elizabeth P. Flint ,
David T. Patterson ,
David A. Mortensen ,
George H. Riechers  and
Jan L. Beyers
Elizabeth P. Flint
Affiliation:
Duke Univ. Phytotron, Durham, NC 27706
David T. Patterson
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., Durham, NC 27706
David A. Mortensen
Affiliation:
Bot. Dep., Duke Univ., Durham, NC 27706
George H. Riechers
Affiliation:
Bot. Dep., Duke Univ., Durham, NC 27706
Jan L. Beyers
Affiliation:
Bot. Dep., Duke Univ., Durham, NC 27706
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Abstract

Sicklepod (Cassia obtusifolia L. ♯6 CASOB), hemp sesbania [Sesbania exaltata (Raf.) Cory ♯ SEBEX], and showy crotalaria (Crotalaria spectabilis Roth. ♯ CVTSP) were grown in controlled-environment greenhouses with day/night temperatures of 23/17, 26/20, 29/23, and 32/26 C. Plant height, leaf area, and total dry weight at 53 days after planting increased significantly with temperatures between 23/17 and 29/23 C in sicklepod and showy crotalaria, and between 23/17 and 32/26 C in hemp sesbania. In all species, leaves were produced more rapidly as temperature increased. Axillary branch leaf production was greatest at 29/23 C in sicklepod, and at 29/23 and 26/20 C in showy crotalaria; hemp sesbania showed little axillary branch development. Total dry-matter production in all species was closely correlated with leaf area duration, but not with net assimilation rate. Differences in total main stem leaf area in all species were primarily due to differences in leaf number rather than to differences in leaf size at maturity.

Keywords

Cassia obtusifoliaSesbania exaltataCrotalaria spectabilisgrowth analysisCASOBSEBEXCVTSP
Type
Weed Biology and Ecology
Information
Weed Science , Volume 32 , Issue 5 , September 1984 , pp. 655 - 663
Copyright
Copyright © 1984 by the Weed Science Society of America 

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